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Nassau County, NY

Tuesday : a high of 62.1°F averaged over Nassau County, NY, the coldest 29 September day in the county average since 1984, 3rd coldest of 76 (county average from NOAA gridded data, 1951 to 2026).

Last updated . This page normally updates every day; the latest update is late.

High
62.1°F
Coldest since 1984
3rd coldest of 76
Low
56.3°F
Warmest since 2025
27th warmest of 76
Precipitation
0.25 in
Wettest since 2024
13th wettest of 76
Every 29 September high of the county average in Nassau County, NY since 1951: 62.1°F in 2026; the highest is 83°F, in 2025.
1984: 56.3°F2025: 83°F2026: 62.1°F 2026 62.1°F since 1984 1951 2026
  • Normal range, 65.7 to 78.6°F
Every year as a table

Every 29 September low of the county average in Nassau County, NY since 1951: 56.3°F in 2026; the lowest is 40.2°F, in 1957.

YearHigh, °FLow, °F
202662.156.3
20258365.3
202469.660.9
20236556.4
202270.152.6
202172.654
202077.666.1
201981.662
201865.752.7
201778.551.6
201667.758.5
201579.164.6
201482.358.6
201371.952
20126958.2
201171.165.1
201074.164.3
20097352
200873.563.1
200776.455.8
200672.956
200575.854.6
200469.859.8
20037153.7
200273.953.2
200166.950
200065.641.8
199976.663.4
199876.249.6
199770.457.6
199673.558.1
199571.248.7
199470.853.1
199365.249.2
199268.255.3
19916341.1
199075.654.2
198964.641.8
198878.752.3
198778.759.4
198665.958.9
198571.452.3
198456.346.9
19836949.7
198271.656.3
198167.346.7
198070.449.3
197974.258.4
197869.242
197772.153
19766741.9
197568.950
197472.959.3
197374.858.1
19726756.9
197171.261.3
197062.747.2
196967.148.7
196872.551
196772.965.9
19666354.3
196565.643.5
196460.252.5
196373.455.4
196263.254.5
196174.247.4
196068.561.5
195980.869.3
195865.742.9
195763.140.2
195664.352.3
195574.555.3
195477.654.8
195376.154.8
19527749.5
19516644.9

The month

September 2026 so far averaged 67.2°F in Nassau County, NY, the warmest 1 to 29 September in the county average since 2025, tied 34th warmest of 76 (with 1973) (county average from NOAA gridded data, 1951 to 2026).

The month in words
  • August 2026 averaged 75.4°F in Nassau County, NY, the warmest August in the county average since 2022, tied 19th warmest of 132 (with 2006 and 1959) (county average from NOAA's monthly county data, 1895 to 2026).
  • Tuesday 29 September 2026: a low of 56.3°F averaged over Nassau County, NY, the warmest 29 September night in the county average since 2025, tied 27th warmest of 76 (with 1982) (county average from NOAA gridded data, 1951 to 2026).
  • Tuesday 29 September 2026: 0.25 in of precipitation averaged over Nassau County, NY, the wettest 29 September in the county average since 2024, tied 13th wettest of 76 (with 2024) (county average from NOAA gridded data, 1951 to 2026).
Days of the month without a value
0

Nearby

New York-Kennedy Airport, NY 11.1 mi, the nearest city with its own station